A new functionalized mesoporous polymer with high efficiency for the removal of pollutant anions

摘要

A new mesoporous polymer, mesoporous poly-triallylamine (MPTA-1), has been synthesized by a simple and facile in situ radical polymerization of triallylamine through organic-organic self-assembly of anionic or anionicon-ionic mixed surfactant systems. Powder XRD and TEM image analysis suggests the presence of disordered wormhole-like mesopores in these samples. N2 sorption analyses reveal bimodal pore size distributions on the nanoscale with moderately good surface areas (70-134 m~2 g~(-1)) for these MPTA-1 samples. Template-free protonated MPTA-1 samples carry positively charged nitrogen atoms in the mesoporous framework, which is reflected in its high anion exchange efficiencies from aqueous solutions. High anion exchange efficiency of MPTA-1 has motivated us to explore its potential application in the removal of pollutant anions such as CrO_4~(2-), MnO_4~-, AsO_3~(3-), NO_3~- and PO_4~(3-), which can be present in significant quantities in various wastewater sources.